keyboard.h

一个在51单片机下PS/2键盘的应用

/*www.wzlab.com
 *ps2键盘驱动
 *使用终端读数据
 *
 */
#ifndef _KEYBOARD_H_
#define _KEYBOARD_H_

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
#include <avr/pgmspace.h>
#include <stdio.h>

#define PIN_DIR DDRD	//端口方向
#define PIN_KB  PIND	//端口读入
#define PORT_KB PORTD	//端口发出

#define CLOCK   3	//键盘时钟
#define DATAPIN 2	//键盘数据

#define BUFF_SIZE 32	//缓冲区大小
extern const unsigned char unshifted[] PROGMEM;
extern const unsigned char shifted[] PROGMEM;

extern unsigned char bitcount;  
extern unsigned char kb_buffer[];
extern volatile unsigned char kinput;
extern unsigned char koutput;

extern void put_kbbuff(unsigned char c);
extern int keyboard_getchar(void);
extern void keyboard_init(void);
extern void decode(unsigned char sc);
 
#endif